Tractor-truck mechanism.



l D I6.

I I9 Patented Mar. 5, 1918.

2 SHEETS-SHEET 8. HOLT. TRACTOR TRUCK MECHANISM.

APPLICATION FILED DEC. H, l9l6- 1,258,607.

Patented Mar. 5, 1918.

2 SHEETSSHEET 2.

WITNESSES:

INVENTOR the track tor truck BENJAMIN no;

T. OF S'J'FGCKTO'N, CALIFORNIA.

TRACTOR-TRUCK IVIECIIANISM.

Application. filed Tile-camber 11, 1916.

To all QU/tO/lb tit moy cry/warn:

Be it knbwn that it, BENJAMIN Home, a citizen oil the United States, residing at Stockton, in the county oil San Joaquin and State of t alil'ornia, have invented new and useful improvements in Tractor ilruck Qtlechanism, ot which the following is a spec ilicattion.

This invention relates wheels :l'or endless chain tracks, such as used in tractors oi the. self-laying track type; and has for its object to provide itUl a better and more even distrilnition of the wear upon the sprocket teeth ol the track and wheels.

'lrhis object I accomplish by the provision of flanges on the sides ol the, wheel 'tcllies to receive and support the rail heads o't thc track links in such position as to relieve a grea t portion of the wear upon the teeth and periphery ot the wheels and pin teeth of links. aecoin )a nyin;; drawings: 1 shows a side elevation ot a tracmeehanism embodying my inven to guide and drive .i n the Figure tion.

Fig. shows a, side. elevation ol the sprocket driving wheel employed therein.

Fig. 23 shows an edge view ol' the same.

Fig. l shows a. sectional view, taken on the line 1- 4; ol Fig. 2.

Fig. 5 shows a eircumtertaitial view ot the blank rim guide wheel employed in the tractor truck mechanism.

Fina ti shows an edge view ol the same.

Fig. 7 shows a sectional view on the line T -7 of his.

'lhe tractor truck mechanism shown herein includes a ilrout blank rim guide wheel 10 and a rear toothed rim drive wheel. it, over which operates an endless chain track 12. 'lhe. trark is made up of a series of a rticulated link sectio .s, each coinprisingspaced side, plates 1; connected together at one end by a sleeve or gudgeon block 141;, cored to receive a journal pin for connecting adjacent. links together, said sleeves or gudgcon blo it. :t'orming also pin teeth to engage with the sprocket teeth 16 on the wheel 11. The side, bars 13 have rail heads ti on their inner longitudilial edges, forming' a continuous track for supporting a series of rollers in, the latter carrying the weight of the tractor or vehicle frzune. The side bars 1; ol the link sections straddle the rims ot' the wheels 10 and 11 for the purpose of better Specification of Letters Patent.

Patented Mar. 5, 1918.

Serial NO. 136,221.

heads 17 of the links rest when the said links are in. engagement with the teeth of the driving wheel or passing around the rim of the blank ry'idc wheel.

'lwo forms of flanges are shown, one in Figs. 3 to at, applicable to the toothed driving wheeh and one in Figs. 5 to 7, applied to the blank rim guide wheel. The former consists ol. interrupted flanges 19 cast on opposite sides of the telly of the wheel and receiving removable blocks 20 secured in place by bolts extending; through the telly of the wheel, said blocks 20 being provided with vertical extensions 22 lying beneath the protruding rim of the wheel. The removable blocks 20 have an advantage in that they permit easy replacement in case of early wear and also in allowing; material ditl'erent from the wheel to be used therein. For some purposes material other than metal might be desired. such as fiber, or even rubber, for absorbing the shocks and ehninating the noises.

It. will be noted that the flanges 19 are located between the teeth 16 so that they will serve to engage and support the link sections intermedlately, thereby bridging the space between the opposite ends of the links which ends rest upon and are supported by the teeth and rim of the wheel by means of the transverse pins or sleeves 1-l.

The second form of tlange shown consists of a continuous laterally projecting ring 23, on opposite side ot' the telly ot' the wheel 10 and cast integral therewith. As indicated in i igs. l; and 7, the position of the flanges may be such that; the links are supported in place the eon with their pin teeth ll: slightly raisco from the ruse of the sprocket teeth 16 on the wheel 11 or from the periphery of the, blank rim on the wheel 10, so that all. of: the radial pressure on the wheels is taken up by the flanges 19 and 23. Thus the teeth of the track and drive Wheel are relieved of all strains except the circumferential stresses necessary for driving.

Various changes in the construction and arrangement of the several parts herein shownand described may be employed without departing from the spirit of my invention as disclosed in the appended claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent isl. A wheel for tractor truck mechanisms over which an endless chain track operates, said wheel having a narrow rim adapted to be straddled by the links of the chain track,

"and flangesegments formed at spaced intervals on the telly of the wheel to receive and support the link sections at their inner longitudinal edges.

in a tractor truck mechanism, an endless chain track made up of a series of articulated link sections having side bars, and a Wheel over which said track operates, said wheel having its rim straddled by the side bars of the link sections, and flange segments formed at spaced intervals on opposite sides of thefelly of the wheel to receive and suport the inner longitudinal edges of the side are.

3. In a tractor truck mechanism, an end-' less chain track. made up of a series of articelated link sections having side bars and a wheel over which said track operates, said wheel having its rim straddled by the side bars of the link sections, and removable flange segments secured to opposite sides of the telly of the wheel to receive and support the inner longitudinal edges of the side bars.

it A toothed driving wheel for tractor truck. .rnecl'ianisins over which an endless,

said wheel having self-laying rail track is adapted to operate, said wheel having a rim and teeth projecting between the rails of the track, and spaced flange segments formed on opposite sides of the felly and the wheel and so positioned relatively to the sprocket teeth as to register with the central portion of the links of the track.

5. In a tractor truck mechanism, an endless chain track made up of a series of articulated link sections having side bars and a wheel over which said track operates, said wheelhaving its rim straddled by the side bars of the link sections, flange segments formed at spaced intervals on o aposite sides of the felly of the wheel, an removable contact members secured on said flanges to receive and support the links of the track at points intermediateof the connections between said links. I

6. A toothed driving wheel for tractor truck mechanisms, over which an endless, self-laying rail. track isadapted to operate,

a rim and teeth projecting between the rails of the tracks, spaced flange segments formed on opposite sides of the telly and the wheel and so'positioned relatively to the sprocket teeth as to register with the central portion 0"" the links of the track, and removable contact members secured on said flanges to receive and support the links of the track at points intermediate oi? the connections between said links.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

BENJAMIN HOLT Witnesses DAN N. GILMOR C. L. hlnninnttnni 

